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<p><B>Logout </B></p>
<p>Altought in is not necessary, you can use this button to logout.
Please note that for security 
reasons you have to login every time you visit LDBN, 
 thus LDBN does not use any global authorization methods such 
as cookies. However, you need to login only in order to post comments or to
create new assginemts. 
<p><B>Edit </B></p>
<p>Use this button to open a dialog where you can change your user data such as
username, email, password. Please note that only the fields that you have modified will be changed.
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